Principles of Biology
2nd Edition
ISBN: 9781259875120
Author: Robert Brooker, Eric P. Widmaier Dr., Linda Graham Dr. Ph.D., Peter Stiling Dr. Ph.D.
Publisher: McGraw-Hill Education
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Chapter 31.1, Problem 1BC
Summary Introduction
To write:
To write about how to recognize the beginning of gametophytic generation.
Introduction:
A gametophyte is one of the phases present in the alternation of generation in the life cycle of plants and algae. It is the sexual phase. Gametophyte are gamete producing and usually in haploid phase. It is in dominant form in
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Discuss the adaptations that have enabled flowering plants to overcome the following problems associated with life on land.* The absence of an aquatic environment for reproduction.* The absence of an aquatic environment to support the plant body.* Dehydration of the plant.
Which of the following processes occurs in a plant's sexual life cycle?
sporophytes produce gametes by meiosis
sporophytes produce gametes by mitosis
gametophytes produce gametes by meiosis
gametophytes produce gametes by mitosis
Which of the following statements about the haplodiplontic life cycle of land plants is/are TRUE?
A During the sporophyte stage, sporangia house diploid mother cells that will eventually undergo meiosis.
B Sperm develop from mitosis in the archegonium.
C Spores grow by mitosis into mature haploid gametophytes.
D The gametophytic stage begins with a diploid spore.
EA and C are both true.
Chapter 31 Solutions
Principles of Biology
Ch. 31.1 - Prob. 1BCCh. 31.1 - What advantages do flowering plants obtain by...Ch. 31.1 - Prob. 2CCCh. 31.1 - Prob. 3CCCh. 31.1 - Prob. 1TYKCh. 31.1 - What is a unique combination of reproductive...Ch. 31.2 - What inference can you draw from the observation...Ch. 31.2 - Prob. 1TYKCh. 31.3 - Prob. 1CCCh. 31.3 - Prob. 2CC
Ch. 31.3 - Prob. 1BCCh. 31.3 - Prob. 1TYKCh. 31.4 - Prob. 1CCCh. 31.4 - Prob. 1TYKCh. 31.5 - Prob. 1TYKCh. 31 - Where do the pollen grams of flowering plants...Ch. 31 - Prob. 2TYCh. 31 - Where would you find female gametophytes of a...Ch. 31 - Prob. 4TYCh. 31 - Prob. 5TYCh. 31 - Prob. 6TYCh. 31 - Prob. 7TYCh. 31 - Prob. 8TYCh. 31 - Prob. 9TYCh. 31 - Why are pollen grain walls composed of...Ch. 31 - Prob. 2CCQCh. 31 - Prob. 3CCQCh. 31 - Prob. 1CBQ
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- In flowers, the structures that produce male gametophytes are called _______ ;the strcutures that produce female gametophytes are called _______ . a. pollen grains; flowers c. anthers; stigma b. stamen; carpels d. megaspores; microsporesarrow_forwardhttp://botit.botany.wisc.edu/botany_130/diversity/plants/mosses.html Make a complete moss life cycle with the following phases and structures. Note: download the images of Mnium from this link and arrange them in the exact sequence to make the lifecycle. Lifecycle structures with cell division: Meiosis, fertilization within archegonium, capsule (sporangium), spores (n), protonema (n) (Image), male gametophyte (n) (Image), female gametophyte (n) (Image), antheridia (Image), archegonia (Image), sperm, egg, water, zygote (2n), embryo, young growing sporophyte (2n), mature sporophyte (2n) (Image), rhizoids. You can insert the non-image part, using the textbox and fill out the suitable s text. For symbol, click on the shape option and inter in your lifecycle diagram at the required placearrow_forwardWhich of the following comparisons between the moss life cycle and fern life cycle are correct? A) Mosses have flagellated sperm that need water to reach the female gamete, while the sperm of ferns are unflagellated and are not dependent on water.B) The sporophyte generation is smaller than the gametophyte generation in mosses, but the sporophyte generation is much larger than the gametophyte generation in ferns.C) The spores are produced in capsules on stalks in mosses but in small structures called sori on the underside of leaves in ferns.D) The gametes are produced in gametangia in mosses but in specialized structures on the underside of leaves in ferns.E) Both kinds of plants depend on wind for dispersal of spores.arrow_forward
- There are two alternative hypotheses about the life cycle of the early vascular plants, the transformation hypothesis and the interpolation hypothesis. If Rhynia and Sciadophyton are the two generations of one species, which hypothesis would be favored? Briefly describe the other hypothesis.arrow_forwardDiagram and describe the development of male andfemale gametophytes and the development of thesporophyte of flowering plants.arrow_forwardWhat is the evolutionary trend in the alternation of generation in plants? Elaborate on adaptive advantages of this trend.arrow_forward
- In a typical angiosperm, what is the sequence of structures encountered by the tip of a growing pollen tube on its way to the egg? ovary → style → stigma stigma → style → ovary ovary→ stigma→ style stigma→ ovary → stylearrow_forwardDescribe at least 2 methods of asexual and sexual reproduction of plants. Cite examples and provide pictures.arrow_forwardWhich statement below is correct regarding the formation of the endosperm in angiosperms? O the endosperm is formed from the female gametophyte and is haploid O a single sperm nucleus fertilizes the egg nucleus to become the diploid zygote O a sperm nucleus forms both the zygote and the endosperm through double fertilization O a second sperm nucleus fuses with the two polar nuclei of the egg sac МacВook Pro G Search or type URL @ 2# $ & * 2 3 4 6 8 W E R Yarrow_forward
- Describe some typical hygrophytic adaptations of plants.arrow_forwardThe sporophyte generation in higher plants include which of the following: 1) seta 2) plant embryo 3 ) anther 4) embryo sac 5) seed cone 6) fruit 7) pollen grain 8.) needle-like leaves 9) protonemata 2. Which characterize Gnetum gnemon? 1 ) netlike venation 2) tracheary elements (vessels and tracheids 3) naked ovules 4) linear, entire leaves 5) dioecious flowers 6) parallel venation 7) vessels 8. broad, entire leaves 9) tracheids 10) ovary walls 11) monoecious flowersarrow_forwardThe following questions refer to the generalized life cycle for land plants shown in the figure below. Each number within a circle or square represents a specific plant or plant part, and each number over an arrow represents either meiosis, mitosis, or fertilization. 6. (5) 2n 8. ndlor, 12 10 8. In the figure above, which number represents the mature gametophyte? O 1 O 7 O 3 O 1 MacBook Pro G Search or type URL %23 24 * 3 4 W E Yarrow_forward
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